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1 <!doctype html>
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2 <html>
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3 <head>
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4 <meta name="viewport" content="width=device-width, initial-scale=1">
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5 <style>
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6 @import "/site.css";
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7 @import "/dad.css";
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8
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9 span[handle] {
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10 display: inline-block;
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11 background-color: LightGreen;
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12 padding: 8px;
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13 }
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14 span[outer] {
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15 display: inline-block;
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16 background-color: LightBlue;
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17 padding: 8px;
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18 position: relative;
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19 }
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20 </style>
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21 <script src="/dad.js"></script>
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22 <script>
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23 dad.whatToDrag = function(draggable) {
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24 return draggable.parentNode;
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25 };
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26
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27 dad.onDrop = function(event) {
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28 let draggable = event.draggable;
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29 let style = draggable.style;
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30 let left = style.left ? parseInt(style.left) : 0;
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31 let top = style.top ? parseInt(style.top) : 0;
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32 let rectDragged = event.dragged.getBoundingClientRect();
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33 let rectDraggable = draggable.getBoundingClientRect();
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34 left += rectDragged.x - rectDraggable.x;
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35 top += rectDragged.y - rectDraggable.y;
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36 style.left = left + 'px';
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37 style.top = top + 'px';
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38 };
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39
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40 function init() {
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41 let span = document.querySelector('span[handle]');
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42 dad.setDraggable(span);
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43 }
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44 </script>
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45 </head>
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46 <body>
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47 <h1>Handle</h1>
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48 <p>
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49 <span outer>
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50 <span handle>drag me</span>
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51 along for the ride
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52 </span>
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53 </p>
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54 <p>bottom</p>
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55 </body>
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56 <script> init(); </script>
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57 </html>
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